Holocene Winter Paleoclimate Reconstructions from Ice-Wedge Archives in the Northwestern Canadian Arctic
Bibliographic record
Abstract
Ice wedges, a direct cold-season precipitation archive, capture a season rarely represented in Arctic paleoclimate proxy records. This thesis utilizes Holocene ice wedges from the Tuktoyaktuk Coastlands (Beaufort Sea coast) to i) develop a winter temperature record from ice-wedge stable water isotopes (δ18O and δD), and ii) to explore the potential of marine aerosol contributions to ice-wedge ion geochemistry to inform past sea ice conditions and paleogeography. A long-term increase in water isotopes from ~7,400 to ~640 yr b2k indicates increasing winter temperatures, following increasing winter insolation at 69°N. Likewise, an increase in the sea-salt component of the major ion record from ~4,600 to ~640 yr b2k may indicate increasing open water conditions in the Beaufort Sea or decreased continentality of the study site. This research supports the potential of ice wedges to provide insight into winter climate dynamics in Arctic regions where glacial ice-core records are unattainable.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".